In briefs submitted with the Supreme Court on Thursday, Georgia, Pennsylvania, Michigan and Wisconsin slammed the Texas lawsuit to prevent those four states from casting their electoral votes as a "meritless" effort to "decimate the electorate of the United States."

The response briefs were filed just ahead of a 3 p.m. deadline the Supreme Court previously gave the states to respond to the Texas suit. The legal action led by Texas Attorney General Ken Paxton -- without the support of his own Solicitor General Kyle Hawkins -- is a remarkable effort to essentially overturn the result of a presidential election after returns have already been certified and presidential electors selected.

It is also unique in that it aims to take advantage of the Supreme Court's original jurisdiction in disputes between states, bypassing lower federal courts, which have uniformly ruled against other election-related litigation by President Trump and his allies. 

The Texas suit gained the backing of 17 other states Wednesday when, led by Missouri, they filed a brief endorsing the Paxton's case. Then on Thursday, Missouri and five other states filed another brief with the Supreme Court this time asking to be allowed to join Texas as litigants in the case. 

Pennsylvania Attorney General Josh Shapiro at a Stand Against Hate rally at Independence Mall on March 2, 2017 in Philadelphia, Pennsylvania. Shapiro called the Texas Supreme Court case aiming to bar Pennsylvania and three other states' presidential electors from casting their votes and effort to "decimate the American electorate."(Photo by Jessica Kourkounis/Getty Images)

Pennsylvania Attorney General Josh Shapiro at a Stand Against Hate rally at Independence Mall on March 2, 2017 in Philadelphia, Pennsylvania. Shapiro called the Texas Supreme Court case aiming to bar Pennsylvania and three other states' presidential electors from casting their votes and effort to "decimate the American electorate."(Photo by Jessica Kourkounis/Getty Images)

MISSOURI, 5 MORE STATES ASK TO JOIN TEXAS SUPREME COURT ELECTION CASE AGAINST GEORGIA, OTHERS

The case has also gained support from 106 members of Congress who signed onto a brief backing the case, but sparked widespread opposition from Democrat-controlled jurisdictions. Washington, D.C. Attorney General Karl Racine led 22 states and territories in filing a brief Thursday against the Texas suit.

President Trump's campaign did the same thing Wednesday.  

But despite the widespread support from red-state attorneys general for Texas' case, attorneys general Pennsylvania, Michigan, Georgia and Wisconsin attacked the suit in their responses as "meritless" and nakedly political. 

"Texas waited until now to seek an injunction to nullify Pennsylvania’s election results because all of the other political and litigation machinations of Petitioner’s preferred presidential candidate have failed," the Pennsylvania brief, led by Attorney General Josh Shaprio, states. 

"The Trump campaign began with a series of meritless litigations. When that failed, it turned to state legislatures to overturn the clear election results," Pennsylvania continued. "Upon that failure, Texas now turns to this Court to overturn the election results of more than 10% of the country. ... Texas literally seeks to decimate the electorate of the United States."

Georgia, led by Republican Attorney General Chris Carr also slammed the Texas suit, specifically defending its increased use of absentee ballots. 

Ken Paxton, Texas attorney general, speaks during a news conference outside the Supreme Court in Washington, D.C., U.S., on Monday, Sept. 9, 2019. Paxton is at the forefront of an effort to prevent presidential electors from Pennsylvania, Michigan, Georgia and Wisconsin from casting their votes. Photographer: Andrew Harrer/Bloomberg via Getty Images

Ken Paxton, Texas attorney general, speaks during a news conference outside the Supreme Court in Washington, D.C., U.S., on Monday, Sept. 9, 2019. Paxton is at the forefront of an effort to prevent presidential electors from Pennsylvania, Michigan, Georgia and Wisconsin from casting their votes. Photographer: Andrew Harrer/Bloomberg via Getty Images

MISSOURI, 16 OTHER STATES FILE BRIEF SUPPORTING TEXAS SUIT TO DELAY PRESIDENTIAL ELECTOR APPOINTMENT

"Those changes by the Georgia Legislature in 2019—combined with the 2020 election’s record turnout and extensive public and private educational efforts regarding voting procedures—explain the allegedly lower rejection rates better than Texas’s factless speculation about the (lawful) steps taken to process absentee ballots," Georgia said. 

The Peach State's brief added: "Texas’s claims are no different than the multiple cases pressed in state and federal courts in Georgia over the past weeks. Since the November election, there have been at least six Georgia cases alleging that state election officials violated the law. ... And none of that litigation has gone anywhere."

Wisconsin, meanwhile, took issue with Texas' characterization of its actions on ballot dropboxes, voter ID for the infirm and the handling of witness addresses. 

"However Texas tries to dress up its quibbles about the Wisconsin election in federal garb, its understanding of Wisconsin election law is just plain wrong," the Wisconsin brief, led by Attorney General Joshua Kaul, said. "The three practices it identifies all comport with Wisconsin statutes."

Texas’s claims are no different than the multiple cases pressed in state and federal courts in Georgia over the past weeks... And none of that litigation has gone anywhere

— Georgia brief in opposition, led by GOP Attorney General Chris Carr

Kaul and Wisconsin urged the Supreme Court to not even agree to hear the Texas case. 

"Texas asserts that this Court’s intervention is necessary to ensure faith in the election. But it is hard to imagine what could possibly undermine faith in democracy more than this Court permitting one state to enlist the Court in its attempt to overturn the election results in other states," the Wisconsin brief says. "Merely hearing this case—regardless of the outcome—would generate confusion, lend legitimacy to claims judges across the country have found meritless, and amplify the uncertainty and distrust these false claims have generated."

Michigan, led by Attorney General Dana Nessell, also laid out a variety of factors that it believes weigh heavily against the Texas case. 

SENATE JUDICIARY COMMITTEE ADVANCES AMY CONEY BARRETT REPLACEMENT ON 7TH CIRCUIT TO FLOOR OVER DEM OPPOSITION

"The base of Texas’s claims rests on an assertion that Michigan has violated its own election laws. Not true," the Michigan brief says. "That claim has been rejected in the federal and state courts in Michigan, and just yesterday the Michigan Supreme Court rejected a last-ditch effort to request an audit. Not only is the complaint meritless here, but its jurisdictional flaws abound and provide solid ground to dispose of this action."

When non-legislative actors in other States encroach on the authority of the 'Legislature thereof' in that State to administer a Presidential election, they threaten the liberty, not just of their own citizens, but of every citizen of the United States who casts a lawful ballot in that election—including the citizens of amici States

— Amicus brief by Missouri and 16 other states supporting the Texas suit

The crux of the arguments from Texas and the states that support it is that the Constitution gives only state legislatures the power to set rules regarding presidential elections. Therefore, when the executive and judicial branches in Wisconsin, Michigan, Pennsylvania and Georgia changed how their elections would work this year in light of the coronavirus pandemic, their elections became invalid. 

"When non-legislative actors in other States encroach on the authority of the 'Legislature thereof' in that State to administer a Presidential election, they threaten the liberty, not just of their own citizens, but of every citizen of the United States who casts a lawful ballot in that election—including the citizens of amici States," the Wednesday brief filed by Missouri and 16 other states says. 

But most legal experts agree that for many procedural reasons the Texas case is almost certain to fail, and that their merits argument is fatally flawed too. 

CLICK HERE TO GET THE FOX NEWS APP

"To begin with, the imagined 'rule' is universally ignored since states have in fact allowed their governors, judiciaries, or both to make rulings and determinations affecting the manner in which presidential elections are held and electors thus chosen," Walter Olson of the libertarian Cato Institute told Fox News. "Texas has done this too."

Harvard law professor and former Supreme Court clerk to late Justice Antonin Scalia Lawrence Lessig, meanwhile, said that the motivations for the Texas case are purely political. 

"This is political posturing through litigation. Not one of those attorneys general believes they are entitled to win," he told Fox News. "As lawyers, that should stop them from signing onto such an action. But they are acting as politicians, not lawyers here — to the detriment of the rule of law."